Token-based authentication is a method used to verify the identity of users or services when accessing a system or application. It relies on the use of tokens, which are unique pieces of data generated after a user successfully logs in.When a user authenticates, the system issues a token that carries certain information, often including user credentials and permissions. This token is then sent along with subsequent requests instead of requiring the user to enter credentials each time. This approach enhances security by reducing the number of times sensitive information is transmitted.Tokens can be short-lived, requiring re-authentication after a certain period, or they can be long-lived and tied to specific user sessions. They are often stored in a user’s device or browser, making it easy to maintain a session without repeatedly logging in.Additionally, tokens can be designed to hold specific data, allowing for more granular access control. Because they can also be signed or encrypted, the integrity and authenticity of the token can be verified. This method provides security and convenience, minimizing the risk of credential theft.